Boiler-furnace



2 Sheets-Sheet l.

(No Model.)

S. PORTER.

BOILBR PURNAGE.

Patented Jem.20,1891.

In ffl/a l ....Qm

A TTOHNE Y S 2 Sheets-Sheet 2.

(No Model.)

l s. PORTER.

BOILER FURNACE.

No. 444,984. Patented Jan. 20, 1891.

W/TNESSES .'V

VI E UNITED STATES SAMUEL PORTER, OF

DENVER, COLORADO.

BOILER-FURNAC.

SPECIFICATION forming part of Letters Patent No. 444,984, dated January 20, 1891.

Application filed April 1, 1890.

.To @ZZ whom it may concern:

Be it known that I, SAMUEL PORTER, of Denver, in the county of Arapahoe and State of Colorado, have invented a new and Improved BoilerFurnace, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved boilerfurnace which is simple and durable in construction, utilizes the fuel to the best advantage, insures complete combustion, and consumes the smoke and gas evolved from the burning fuel.

The invention consists of a circular grate mounted to turn and a divided ash-pit arranged below the grate.

The invention also consists in certain parts and details and combinations of the same, as will be described hereinafter, and then pointed out in the claims.

\ compartment of the boiler.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a sectional plan view of the improvement on the line y y of Fig. 3. Fig. 2 is a transverse section of the improvement on the line ze of Fig. 3, and Fig. 3 is a sectional side elevation of the improvement on the line no o3 of Fig. l.

The improved furnace A is provided with the usual brick-work B, supporting the boiler C, below which is formed, near the front end, the fire-box D, divided into two compartments by a transversely-extending waterdrum E, connected by suitable pipes F with the water- The principal use of the water-drum is to divide the furnace transversely into two compartments, the front compartment for coking the coal or fuel and the rear compartment for thorough combustion. The water-drum is placed down close to the fire, so that the gas from the front part in passing under the drum is kept down close to the brisk fire in the rear part; also, its position so close to the fire will generate steam, thereby helping the boiler. The space on top of the drum and from the boiler out to the brick-work of the sides is to be filled in solid with tire-brick or other material, so that the only passage from front to rear of the fire-box is under the water-drum.

The fire-bor` D is provided with a segmental Serial No. 346,161. (No model.)

grate G, mounted to turn and located above the ash-pit H, which is also divided into two compartments by a transverselypxtending wall l, connected with the sides of the brickwork B.

In the front wall of the brickwork B are arranged the fuel-doors J, opening into the tire-box D, so as to permit of introducing the fuel into the front compartment of the fireboX. A fuel-outlet door K is arranged in one of the side walls of the brick-work B, and opens into the rear compartment of the firebox D directly above the circular grate G. The ash-pit H is provided in the front wall of the brick-work B with the doors L, leading to the front compartment of the ash-pit, and the side door N, arranged below the door K, leads to the rear compartment of t-he said ash-pit.

The circular grate Gis preferably arranged as follows: A bevel gear-Wheel G carries in its center a downwardly-extending pin G2, mountedto turn in suitable bearings in a bridge G3, secured in the brick-workl of the furnace. The bevel gear-wheel G meshes into a bevel-pinion O, secured on a shaft O', mounted to turn in suitable bearings and eX-` tending through one side of the brick-work B to the outside, and carrying at its outer end a gear-wheel O2, adapted to be driven by suitable machinery, so as to impart a rotary motion to the shaft O', which latter, by the'pinion O, turns the gear-wheel G. The latter is provided with an annular flange G4, traveling on friction-rollers G5, mounted to turn in suitable bearings in the bridge G3, so that the gear-wheel G moves easily when rotated, as previously described, the center pin G2 being" relieved from all strain. The flange G4 supports the circular grate-bridge G6, supporting the series of gratefplates G7, which can be readily removed and replaced by new ones in case they are worn out. The rim of the gratebridge G6 extends a suitable distance above the top of the plates ll to prevent the .fuel from falling off the latter.

lt is understood that the sides of the firebox B in that part which contains the circular grate G are made circular, so that no fuel held on the grate can fall into the ash-pit H without passing through the grate-plates G7. The back of the ash-pit I-I is formed by a IOO transverse wall I3', extending slightly above the top of the grate G at the rear compartment of the fire-box D, which latter at this rear end connects with the space P, formed between the brick-work B under the rear part of the boiler C, and leads to the space P', eX- tending at the back end of the boilerl C, so .that the heat passing through the spaces P and P' from the tire-box D can pass into the rear ends of the smoke-lines Q of the boiler C, and then through the same to the chim- Vney R.

The operation is as follows: The grate Gis caused to revolve in the manner previously described, and in the direction of the arrow a', and after the lire is started additional fuel is passed onto the grate through the doors J. The fuel burns very slowly in the front compartment of the fire-box D, owin g to the transverse drum E, which prevents a direct draft from the spaces P and P', connected by the tlues Q with the chimney It, and as this is the only space for the smoke and gases to pass v through the water-drum keeps said gases and smoke down close to the briskly-burning fire in the rear compartment, and they are thereby consumed. The fuel, after passing the transverse drum E and entering' the rear compartmentof the fire-box D, is subjected to a heavy draft, as this rear compartment is directly and openly connected with the spaces P and P', the air being introduced through the ashpit door N, located in one side of the brickwork B. rl`he coking is all done in the'y frontv part of the grate before passing the waterdr-um. The object of the coking in the front part of the grate is to produce a gas that will burn in passingoverthebrisk fire in the back part of the grate. (Hardly any smoke will be produced. Smoke willnot burn at a lowtemperature.) The door K is for cleaning the fire, or, in other words, for removing cinders that may have caked and would not go thro ugh the grate. By the time the fuel has arrived at the door K it is well coked, and is removed from the grate G through the side door K by suitable means. Thus it will be seen that the fuel in the front compartment of the tirebox D burns very slowly, while in the rear compartment it burns very brightly, so that the coal is thoroughly coked, and the heat is applied under the center of the boiler, so that the watertherein is rapidly converted into steam. It will further be seen that as the drum E,containing boiler-water,is subjected to considerable heat a complete circulation of the water in the boiler is established by the connection of the drum E with the pipes F, leading to the water-compartment of the boiler. It will further be seen that at the front doors J and L the draft in the front compartments of the fire-box D, as well as the ash-pit Il, can be controlled separately from the draft in the rear compartments of the said fire-box and ash-pit, in which the draft is controlled by the doors N and K.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a furnace, the combination, with a fire-box provided with a revoluble grate, of a divided ash`pit arranged below the said grate, substantially as shown and described.

2. In a furnace, the combination, with a grate mounted to turn, of a transversely-divided ire-box arranged above the said grate and a similarly-divided ash-pit arranged below the said grate, substantially as shown and described.

3. In a boiler-furnace, the combinationvith a water-drum connected with the water-com` partment of the boiler, of a fire-box through which passes transversely the said waterdrum, and a circular grate mounted to turn below the said fire-box, substantially as shown and described.

4f. In a boiler-furnace, the combinatiomwith a water-drum connected with the water-compartment of the boiler, of a fire-box through which passes transversely the said waterdrum, a circular grate mounted to turn below the said fire-box, and doors leading to the front compartment of the said fire-box and a door leading from the rear compartment of said fire-box, substantially as shown and described.

5. In a boiler-furnace, the combination,with a water-.drum connected with the water-compartment of the boiler, of a fire-box through which passes transversely the said waterdrum,a circular grate mounted to turn below the said tire-box, and an ash-pit arranged below the said grate and having a transverse partition dividing the ash-pit into a front and rear compartment, substantially as shown and described.

(i. In a boiler-furnace, the combination,with a water-drum connected with the water-compartment of the boiler, of a fire-box through which passes transversely the said waterdrum,a circular grate mounted to turn below the said fire-box, au ash-pit arranged below the said grate and having a transverse partition dividing the ash-pit into a front and rear compartment, and doors lea-ding to the front compartment ot' the said ash-pit and a door leading from the rear compartment of the said ash-pit, substantially as shown and described.

7. In a furnace, the combination, with a transversely extending water drum connected with the boiler, of a fire-box divided by the said drum into a front and a rear compartment, inlet and outlet doors connected with the said front and rear compartments, respectively, and a circular grate mounted to turn and arranged in the bottom of the said fire-box, substantially as shown and described.

8. In a furnace, the combination, with a transversely extending water drum connected with the boiler, of a fire-box divided by the said drum into a front and a rear compartment, inlet and outlet doors connected with the said front and rear compartments,

IOC

IIO

respectively, a circular grate mounted to turn and arranged in the bottom of the said tireboX, and means, substantially as described, for imparting a rotary motion to the said grate, as set forth.

9. In a furnace, the combination, With a transversely extending Water drum connected with the boiler, of a ire-boX divided by the said drum into a front and a rear compartment, inlet and outlet doors connected with the said front and rear compartments,

respectively, a circular grate mounted to turn and arranged in the bottom of the said rebox, and an ash-pit having a transverse partition dividing it into a front and a rear compartment, each having a door, substantially as shown and described.

SAMUEL PORTER. Witnesses:

CHARLEs PILLAR, C. J. WOLFE. 

